Radial tires need special heavy duty tubes to accommodate the side to side squirm of the sidewalls. Regular bias ply tubes will scuff against the sidewalls of a radial tire and potentially develop air leaks.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!